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Large Gearbox Noise Reduction

Reduced operating noise from 92dB to 78dB through gear parameter redesign and profile modification.

Client Background A large mining equipment manufacturer’s gearbox operated at 92dB noise level.

Solution

  1. Redesigned gear parameters for optimal contact ratio
  2. K-type profile modification 0.02~0.04mm
  3. Upgraded from hobbing to grinding (DIN 5)
  4. Surface finish Ra≤0.4μm

Results

  • Noise reduced to 78dB (14dB reduction)
  • Gear life extended 40%
  • Maintenance interval from 3 to 12 months